The LTC3727/LTC3727-1 are high efficiency dual 12V/5V step-down converters with features including wide output voltage range, out-of-phase controllers, OPTI-LOOP compensation, output voltage accuracy, and power good output voltage monitor.
This manual describes the high‑efficiency, dual‑phase LTC3727 and LTC3727‑1 step‑down switching regulator controllers. It covers features such as a wide output voltage range, low‑dropout operation, selectable constant‑frequency or burst‑mode operation, and protection functions like over‑voltage and short‑circuit shutdown. The document also lists typical applications in telecom, automotive, and battery‑operated devices.
Detailed sections include absolute maximum ratings, electrical characteristics tables, typical performance graphs, pin function descriptions, and package dimensions for both the 28‑lead SSOP and 5 mm × 5 mm QFN versions. Ordering information and part markings are provided at the end of the document.
| Output Voltage Range | 0.8 V – 14 V |
|---|---|
| Input Voltage Range | 4 V – 36 V |
| Maximum Duty Cycle | 99 % |
| Shutdown Current (Ig) | 20 µA |
The LTC3727 provides an output voltage range from 0.8 V to 14 V.
The device operates with an input voltage between 4 V and 36 V.
The RUN/SS pins (RUN/SS1 and RUN/SS2) provide soft‑start control.